Overhead lightning protection double conductor insulated grounding wire capable of melting ice

Abstract

The invention relates to an overhead lightning protection double conductor insulated grounding wire capable of melting ice, so as to solve the ice coating problem of the overhead grounding wire. Ice melting and snow removing can be realized with minimal cost input, and in the case of a lightning strike or line fault, a transmission phase line can be protected from being damaged, and the overhead grounding wire itself is intact. In the technical scheme of the invention, the grounding wire comprises a conductive magnetic body inner layer, a composite insulated layer and a conductive magnetic body outer layer sequentially from inside to outside, wherein the conductive magnetic body inner layer is formed by stranding multiple galvanized steel wires; the composite insulated layer is formed by an insulated inner layer, a main insulated layer and an insulated outer layer in a covering mode, and the insulated inner layer and the insulated outer layer are semi conductive layers; the conductive magnetic body outer layer is formed by stranding multiple galvanized steel wires and coats the insulated outer layer; and the galvanized steel wire adopts soft magnetic steel wire galvanization. The overhead lightning protection double conductor insulated grounding wire capable of melting ice is applicable to lightning protection and ice melting of a high voltage overhead transmission line grounding wire in a power system.

Description

technical field

[0001] The invention relates to an overhead lightning protection double-conductor insulated ground wire capable of melting ice. It is suitable for lightning protection and ice melting of the ground wire of high-voltage overhead transmission lines in power systems. Background technique

[0002] Since 2008, there have been rare low-temperature rain and snow freezing disasters in the history of southern my country. The icing of many lines far exceeds the capacity of the lines, causing large-scale disconnection or downed towers. The ground wire erected above the transmission line is usually fixed on the top of the line iron tower. During the period of icing, the conductor and ground wire of the transmission line will be covered with ice. Since the overhead ground wire is higher than the conductor, and under the normal operation of the transmission line There is no current flowing through the overhead ground wire, and the ice thickness of the overhead ground wir...

Examples

Embodiment Construction

[0031] Such as Figure 4 , Figure 5 As shown, the double-conductor insulated ground wire for overhead lightning protection capable of melting ice in this embodiment is composed of a three-layer structure, which is a conductive magnetic inner layer 1, a composite insulating layer 2 and a conductive magnetic outer layer 3 from the inside to the outside.

[0032] The conductive magnetic inner layer 1 is twisted by a plurality of galvanized steel wires (twisted with a wire twisting machine). Due to the need for magnetic conduction, the galvanized steel wires are galvanized with soft magnetic steel wires or martensitic stainless steel wires. zinc. The conductor cross-sectional area of ​​the conductive magnetic inner layer 1 should not be less than 50mm 2 .

[0033] The composite insulating layer 2 is composed of an insulating inner layer 2-1, a main insulating layer 2-2 and an insulating outer layer 2-3, wherein the insulating inner layer 2-1 and the insulating outer layer 2-3 ...

technical field

[0001] The invention relates to an overhead lightning protection double-conductor insulated ground wire capable of melting ice. It is suitable for lightning protection and ice melting of the ground wire of high-voltage overhead transmission lines in power systems. Background technique

[0002] Since 2008, there have been rare low-temperature rain and snow freezing disasters in the history of southern my country. The icing of many lines far exceeds the capacity of the lines, causing large-scale disconnection or downed towers. The ground wire erected above the transmission line is usually fixed on the top of the line iron tower. During the period of icing, the conductor and ground wire of the transmission line will be covered with ice. Since the overhead ground wire is higher than the conductor, and under the normal operation of the transmission line There is no current flowing through the overhead ground wire, and the ice thickness of the overhead ground wir...

Examples

Embodiment Construction

[0031] Such as Figure 4 , Figure 5 As shown, the double-conductor insulated ground wire for overhead lightning protection capable of melting ice in this embodiment is composed of a three-layer structure, which is a conductive magnetic inner layer 1, a composite insulating layer 2 and a conductive magnetic outer layer 3 from the inside to the outside.

[0032] The conductive magnetic inner layer 1 is twisted by a plurality of galvanized steel wires (twisted with a wire twisting machine). Due to the need for magnetic conduction, the galvanized steel wires are galvanized with soft magnetic steel wires or martensitic stainless steel wires. zinc. The conductor cross-sectional area of ​​the conductive magnetic inner layer 1 should not be less than 50mm 2 .

[0033] The composite insulating layer 2 is composed of an insulating inner layer 2-1, a main insulating layer 2-2 and an insulating outer layer 2-3, wherein the insulating inner layer 2-1 and the insulating outer layer 2-3 ...

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